Objective  To investigate the effects of the development of Purkinje cells and expression of cerebellin in postnatal mice with intrauterine  hypoxia.    Methods  Twenty healthyice were randomly divided into two groups: control group and hypoxia group, with 10 mice in each group. Mice in the hypoxia group were placed in the hypoxia chamber of the animal since the 14th day of gestation to make an animal model of intrauterine hypoxia. After the mother gave birth, the experimental animals were divided into hypoxia group and control group. There were 6 age groups including postnatal day  (P)0, P5, P9, P14, P21 and P30 in each group, and 5 mice in each age group. The cerebellum tissue was taken for vibrating sectioning. The developmental changes of calbindin-positive Purkinje cells were detected by immunofluorescence technique. The expression of cerebellin in Purkinje cell protuberances was detected by cerebellin (CBLN)1, CBLN4 and calbindin double labeling. Finally, Western blotting was used to semiquantitatively analyze the protein expression of cerebellar peptide in cerebellum at each time point.   Results  Compared with the control group of the same age, the number of cerebellar Purkinje cells in the hypoxic group decreased, the dendritic branches decreased, and the arrangement was disordered, and the expression of CBLN1 and CBLN4 in the cortex were significantly reduced.    Conclusion  Intrauterine hypoxia leads to abnormal development of the cerebellar Purkinje cells and synaptic changes.